# -*- coding:utf-8 -*-
import re
import pymongo

from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from pyquery import PyQuery as pq
from selenium.webdriver.chrome.options import Options

MONGO_URL = 'localhost'
MONGO_DB = 'taobao'
MONGO_TABLE = 'product'

client = pymongo.MongoClient(MONGO_URL)
db = client[MONGO_DB]


chrome_options = Options()
chrome_options.add_argument('--headless')
chrome_options.add_argument('--disable-gpu')

browser = webdriver.Chrome(chrome_options=chrome_options)
wait = WebDriverWait(browser, 10)


def search():
    try:
        browser.get("https://www.taobao.com")
        input = wait.until(
            EC.presence_of_element_located((By.CSS_SELECTOR, "#q"))
        )
        submit = wait.until(
            EC.element_to_be_clickable((By.CSS_SELECTOR,
            '#J_TSearchForm > div.search-button > button'))
        )
        input.send_keys('美食')
        submit.click()
        total = wait.until(EC.presence_of_element_located(
                (By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > div.total')))
        get_products()
        return total.text
    except TimeoutException:
        return search()


def next_page(page_number):
    try:
        input = wait.until(EC.presence_of_element_located(
                (By.CSS_SELECTOR, "#mainsrp-pager > div > div > div > div.form > input")))
        submit = wait.until(EC.element_to_be_clickable(
                (By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > div.form > span.btn.J_Submit')))
        input.clear()
        input.send_keys(page_number)
        submit.click()
        wait.until(EC.text_to_be_present_in_element(
                (By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > ul > li.item.active > span'), str(page_number)))
        get_products()
    except TimeoutException:
        next_page(page_number)


def get_products():
    wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-itemlist .items .item')))
    html = browser.page_source
    doc = pq(html)
    items = doc('#mainsrp-itemlist .items .item').items()
    for item in items:
        product = {
            'image': item.find('.pic .img').attr('src'),
            'price': item.find('.price').text().replace('\n', ' '),
            'deal': item.find('.deal-cnt').text()[:-3],
            'title': item.find('.title').text().replace('\n', ' '),
            'shop': item.find('.shop').text(),
            'location':item.find('.location').text()
        }
        print(product)
        save_to_mongo(product)

def save_to_mongo(result):
    try:
        if db[MONGO_TABLE].insert(result):
            print('存储到MONGO_DB成功', result)
    except Exception:
        print('存储到MONGO_DB错误', result)




def main():
    total = search()
    total = int(re.compile('(\d+)').search(total).group(1))
    for i in range(2, total + 1):
        next_page(i)
    browser.close()

if __name__ == '__main__':
    main()

